EP0231398B1 - Continuous mixing and shearing mill - Google Patents

Continuous mixing and shearing mill Download PDF

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Publication number
EP0231398B1
EP0231398B1 EP85116647A EP85116647A EP0231398B1 EP 0231398 B1 EP0231398 B1 EP 0231398B1 EP 85116647 A EP85116647 A EP 85116647A EP 85116647 A EP85116647 A EP 85116647A EP 0231398 B1 EP0231398 B1 EP 0231398B1
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EP
European Patent Office
Prior art keywords
roll
rolls
zone
continuous mixing
rolling mill
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
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EP85116647A
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German (de)
French (fr)
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EP0231398A1 (en
Inventor
August Dr.-Ing. Albers
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Individual
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Individual
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Priority to DE19843426436 priority Critical patent/DE3426436A1/en
Priority to AT85116647T priority patent/ATE37158T1/en
Application filed by Individual filed Critical Individual
Priority to DE8585116647T priority patent/DE3660711D1/en
Priority to EP85116647A priority patent/EP0231398B1/en
Priority to US07/011,661 priority patent/US4773762A/en
Priority to JP62024943A priority patent/JPS62254828A/en
Publication of EP0231398A1 publication Critical patent/EP0231398A1/en
Application granted granted Critical
Publication of EP0231398B1 publication Critical patent/EP0231398B1/en
Expired legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/30Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58Component parts, details or accessories; Auxiliary operations
    • B29B7/62Rollers, e.g. with grooves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/30Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/52Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders
    • B29B7/56Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders with co-operating rollers, e.g. with repeated action, i.e. the material leaving a set of rollers being reconducted to the same set or being conducted to a next set
    • B29B7/562Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders with co-operating rollers, e.g. with repeated action, i.e. the material leaving a set of rollers being reconducted to the same set or being conducted to a next set with means for axially moving the material on the rollers
    • B29B7/564Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices with rollers or the like, e.g. calenders with co-operating rollers, e.g. with repeated action, i.e. the material leaving a set of rollers being reconducted to the same set or being conducted to a next set with means for axially moving the material on the rollers at least one of the rollers being provided with helicoidal grooves or ridges, e.g. followed by axial extrusion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/30Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58Component parts, details or accessories; Auxiliary operations
    • B29B7/60Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • B29B7/606Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material specially adapted for feeding calenders or the like

Definitions

  • the invention relates to a continuous mixing and shearing mill for plasticizable material with the features according to the first part of patent claim 1.
  • E-PA-0148 966 discloses a continuous mixing and shear rolling mill for plasticizable material with two tempered rolls rotating in opposite directions at different peripheral speeds, the roll length of which is more than four times the roll diameter and on which sharp-edged grooves are located at an acute angle to the roll axes are arranged in opposite directions to one another, the number of grooves along the roller axes increasing from the bearing side with the material feed to the middle of the roller and decreasing from there to the bearing side with the material decrease, and material feed and removal devices for different material types and additives being arranged, which are adjustable in the axial direction along the nip.
  • the object of the invention is to further develop this continuous mixing and shear rolling mill, which has become known from EP-A-0148966, in order to achieve an optimal shear force effect on the material.
  • a material particle moves, for example, from the feed side to the take-off side in 60 to 250 seconds.
  • the speed behavior is periodically measured by the two shear rollers in a ratio of 5: 1 to 1: 5 in a time rhythm of e.g. Changed 5 to 50 seconds.
  • the material particle on its way in the kneading bead and on the roller is exposed to shear forces that change considerably several times.
  • the two shear rollers are equipped with different temperature zones along the path of the material.
  • at least three different temperature zones are advantageous along the bale length of the rollers, and two in the case of larger rollers (approximately from 1500 mm bale length) at least three different temperature zones. They are achieved by separately supplying and discharging the various tempered liquids.
  • the roller sections on the feed side 2.1 of the material 8.3 are heated such that the material 8.3 to be processed adheres to the surface of the roller 31.
  • roller section of the feed side 2.1 is tempered by the lines 1.11 and 1.12. This section almost always has to be heated much higher than the middle zone 2.2 and zones 2.3 and 2.4.
  • the inner second temperature control zone with the inlet and outlet lines 1 .21 and 1.22 as well as the outer protective heating 1.23 are provided.
  • thermoplastic materials e.g. are melted from the powder or granular state
  • a significantly different groove geometry of the two shear rollers has proven to be advantageous.
  • the material-covered front roller 31 is equipped with grooves 35, the geometry of which varies considerably along the length of the bale, as shown in FIG. 2a.
  • the depth of the grooves 35 is continuously reduced to about half the value of the material feed zone 2.1, preferably to 2.0 to 2.5 mm depth, as in the case of a core-progressive screw. It is advantageous for some materials that are very tough to double the number of grooves 35 to improve the material transport.
  • the material is homogenized and often cooled 8.3.
  • the depth of the groove 35 is continued from the outlet of the core-progressive middle zone 2.2 to the groove outlet.
  • the material cooling in the third and fourth roller sections, in the homogenization zone 2.3 and in the removal zone 2.4 reduces the tendency to stick to the rollers 31 and 32. At lower temperatures, the material strength also increases.
  • the removal zone 2.4 is expediently carried out with approximately 10% to 15% of the bale length on both rollers 31 and 32 without grooves 35 and 36.
  • the smooth web surfaces 38 between the inclined grooves 35 are provided with a plurality of material holes 3.1 as dimples in the feed and mixing area of the roller 31, as shown in FIG. 3.
  • the hole diameter is 2 to 20 mm, preferably 3.5 to 5 mm with a total depth of approx. 2 to 3 mm.
  • the ratio of the hole diameter to the hole depth is to be dimensioned such that, on the one hand, due to a somewhat longer dwell time of the material 8.3, the material 8.3 temporarily adheres or melts in the blind hole 3.1, and on the other hand, through the counter-roller 32, enough new, colder material 8.3 Exchange of the hole content is pressed.
  • the blind holes 3.1 improve the adhesion of the material covering of the roller 31 by mechanical clamping and additionally form heat exchange surfaces.
  • the shear roller system only works with an oppositely driven, equally grooved roller 32, which forms the other part of the shear or roller gap 37 without material support.
  • the task of the grooves 36 in the counter-roller 32 is to introduce the shear forces into the outer layer of the material-covered front roller 31, to introduce new material 8.3 into this layer and to generate the material shear force along the material kneading.
  • the depth of the grooves 36 of the counter-roller 32 is kept much smaller than in the material-covered front roller 31. This groove depth is at about half of the working or roller gap 37, for example between 1 and 3 mm.
  • the counter-roller 32 is grooved at a depth from the feed zone 2.1 to the smooth outlet in the removal zone 2.4.
  • the addition material 8.3 is drawn into the nip 37 and there intimately mixed with the plastic material 8.3, or embedded in the plastic material layer 8.3.
  • These grooves 36 push the material 8.3 over the groove angle in the kneading and on the work roller 31 in the direction of the take-off side 2.4, if both rollers 31 and 32 are driven in opposite directions and also have an opposing groove angle.
  • groove sections 4.2 with a counter pitch are arranged on the roller 32 to increase the mixing effect, as shown in FIG. 4.
  • the counter slope of the grooving produces kneading vortices 4b rotating in opposite directions locally perpendicular to the roller gap 37, as shown in FIG. 4a.
  • the zones of the counter slope may only be short, because otherwise the entire material transport in the kneading or roller gap 37 in the direction of the removal zone 2.4 comes to a standstill.
  • At least two counter-conveying zones 4.1 and 4.2 are arranged in the roller 32, which, however, should only have a length of 0.25 to 1 times the roller diameter and must have intermediate sections with a strong conveying pitch of at least one or two roller diameters in length.
  • the roller 32 is equipped with two larger counter-conveyor sections 4.3. While the roller 31 is covered with material 8.3, a liquid is left at points A and B, e.g. Oil in rubber processing or a liquid stabilizer B in the kneading or roller gap 37. As long as the two rollers 31 and 32 are rotating, the liquid is conveyed against each other by the opposite groove increase and reaches the material to be processed 8.3 via the vertical material vortex.
  • points A and B e.g. Oil in rubber processing or a liquid stabilizer B in the kneading or roller gap 37.
  • the various jacket segments 4.1, 4.2, 3.4, 4.4 are axially lined up and tested on the tempered roller cores, the rollers 31 and 32 being able to be fitted with the various segments as desired, as can be seen from FIG. 6a.
  • the grooves 35, 36 run out in a smooth roller section (2.4) with about 10% of the bale length.
  • the processed material 8.3 is removed, as the following FIGS. 7 to 9a show.
  • the material is removed as strips 7.1 with a strip cutting roller 7, as shown in FIG. 7. It is equipped with round knives 7.6 and driven with a pair of gearwheels 7.2 from the roller 31 at a somewhat higher speed (approx. 5% to 10% advance). Depending on the number of circular knives 7.6, several strips 7.1 are produced at the same time, which are cut into cube granules 7.5 in a cross-cutting device 7.4 with removal block 7.3 and knife roller.
  • a driven hollow cylinder 8.1 is pressed against the plastic material layer of the roller 31.
  • the outer circumference of the cylinder 8.1 contains a plurality of bores 8.2 through which the plastic material 8.3 is pressed into the open interior.
  • the outer jacket runs through a shell 8.6 filled with water or other coolant.
  • tough plastic and very sticky materials 8.3 are removed from the roller 31 with a removal and shaping screw 9.0, as shown in FIGS. 9 and 9a. It is arranged from the outside with its adapted cylinder opening 9.1 vertically up to a small distance from the material-covered roller 31. The webs 9.3 of the rotating screw 9.0 scrape plastic material 8.3 down from the smooth roller section 2.4 and feed it to a molding die 9.4. There it is then further processed with known granulating or profiling devices.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Crushing And Grinding (AREA)
  • Metal Rolling (AREA)

Abstract

A continuous shearing rolling mill is disclosed with improved roll drive system, roll temperature control, surface and groove geometries of the shearing rolls, and material discharge and pelletizing devices on the front roll.

Description

Die Erfindung betrifft ein kontinuierliches Misch- und Scherwalzwerk für plastifizierbares Material mit den Merkmalen nach dem ersten Teil des Patentanspruchs 1.The invention relates to a continuous mixing and shearing mill for plasticizable material with the features according to the first part of patent claim 1.

Aus der E-PA-0148 966 ist ein kontinuierliches Misch- und Scherwalzwerk für plastifizierbares Material mit zwei, mit unterschiedlicher Umfangsgeschwindigkeit gegenläufig rotierenden temperierten Walzen bekannt, deren Walzenlänge mehr als das Vierfache des Walzendurchmessers beträgt und auf denen im spitzen Winkel zu den Walzenachsen scharfkantige Nuten gegenläufig zueinander angeordnet sind, wobei die Zahl der Nuten entlang den Walzenachsen von der Lagerseite mit der Materialaufgabe bis zur Walzenmitte zunimmt und von dort bis zur Lagerseite mit der Materialabnahme wieder abnimmt und wobei Materialaufgabe- und -abnahmevorrichtungen für verschiedene Materialtypen und Zugabestoffe angeordnet sind, welche in axialer Richtung entlang dem Walzenspalt verstellbar sind.E-PA-0148 966 discloses a continuous mixing and shear rolling mill for plasticizable material with two tempered rolls rotating in opposite directions at different peripheral speeds, the roll length of which is more than four times the roll diameter and on which sharp-edged grooves are located at an acute angle to the roll axes are arranged in opposite directions to one another, the number of grooves along the roller axes increasing from the bearing side with the material feed to the middle of the roller and decreasing from there to the bearing side with the material decrease, and material feed and removal devices for different material types and additives being arranged, which are adjustable in the axial direction along the nip.

Der Erfindung liegt die Aufgabe zugrunde dieses, aus der EP-A-0148966 bekanntgewordene kontinuierliche Misch- und Scherwalzwerk weiterzuentwickeln, um eine optimale Scherkrafteinwirkung auf das Material zu erzielen.The object of the invention is to further develop this continuous mixing and shear rolling mill, which has become known from EP-A-0148966, in order to achieve an optimal shear force effect on the material.

Diese Aufgabe wird mit den Merkmalen im kennzeichnenden Teil des Patentanspruchs gelöst. Versuche ergaben, dass das Schmelzverhalten der zu bearbeitenden Werkstoffe sehr verschieden ist.This object is achieved with the features in the characterizing part of the patent claim. Tests have shown that the melting behavior of the materials to be processed is very different.

Entsprechend gibt es für jeden Werkstoff in den verschiedenen Zustandsformen fest, plastisch oder flüssig jeweils eine optimale Nutgeometrie, eine optimale Temperatur und eine optimale Scherkrafteinwirkung auf das Material.Accordingly, there is an optimal groove geometry, an optimal temperature and an optimal shear force effect on the material for each material in the various states of solid, plastic or liquid.

So ist es vorgesehen, dass das Friktionsverhältnis der beiden Scher-Walzen in Anpassung an das Plastifizierverhalten des Werkstoffs in einem kurzen Rhythmus durch eine gesteuerte Drehzahländerung der Walzen periodisch erheblich verändert wird.It is envisaged that the friction ratio of the two shear rolls will periodically be changed considerably in a short rhythm in order to adapt to the plasticizing behavior of the material by a controlled change in the speed of the rolls.

Während der Bearbeitungszeit bewegt sich ein Materialpartikel zum Beispiel in 60 bis 250 Sekunden von der Aufgabeseite hin zur Abnahmeseite. Das Drehzahlverhalten wird periodisch der beiden Scherwalzen im Verhältnis von 5:1 bis 1:5 in einem Zeitrhythmus von z.B. 5 bis 50 Sekunden geändert.During the processing time, a material particle moves, for example, from the feed side to the take-off side in 60 to 250 seconds. The speed behavior is periodically measured by the two shear rollers in a ratio of 5: 1 to 1: 5 in a time rhythm of e.g. Changed 5 to 50 seconds.

Entsprechend wird das Materialpartikelchen auf seinem Weg in dem Knetwulst und auf der Walze mehrfach zusätzlich erheblich sich ändernden Scherkräften ausgesetzt.Accordingly, the material particle on its way in the kneading bead and on the roller is exposed to shear forces that change considerably several times.

Äusserlich erkennt man die Wirkung dieser Massnahme auch an der wechselnden Grösse und Rotationsrichtung des Materialknetes im Scherspalt.The effect of this measure can also be seen externally from the changing size and direction of rotation of the material kneading in the shear gap.

In einer weiteren vorteilhaften Ausgestaltung werden die beiden Scher-Walzen entlang dem Weg des Materials mit unterschiedlichen Temperierzonen ausgestattet. Bei kleineren Maschinen sind entlang der Ballenlänge der Walzen wenigstens, zwei bei grösseren Walzen (etwa ab 1500 mm Ballenlänge) mindestens drei verschiedene Temperaturzonen vorteilhaft. Sie werden durch getrennte Zu- und Ableitungen der verschiedenen temperierten Flüssigkeiten erreicht.In a further advantageous embodiment, the two shear rollers are equipped with different temperature zones along the path of the material. In the case of smaller machines, at least three different temperature zones are advantageous along the bale length of the rollers, and two in the case of larger rollers (approximately from 1500 mm bale length) at least three different temperature zones. They are achieved by separately supplying and discharging the various tempered liquids.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher erläutert. Es zeigen

  • Fig. 1 eine Längsschnittansicht durch ein temperiertes Walzenpaar eines kontinuierlichen Misch- und Scherwalzwerkes,
  • Fig. 2 eine Ansicht auf ein Walzenpaar mit einer materialbedeckten Walze,
  • Fig. 2a eine Draufsicht auf das Walzenpaar nach Fig. 2,
  • Fig. 3 eine Draufsicht auf ein Walzenpaar mit einer mit Sacklöchern versehenen Walze,
  • Fig. 3a ein Querschnitt im Bereich des Walzenspaltes durch das Walzenpaar nach Fig. 3,
  • Fig. 4 eine Ansicht auf ein Walzenpaar mit einer materialbedeckten Walze,
  • Fig. 4a eine Draufsicht auf das Walzenpaar nach Fig. 4 mit zonenweisen Nutenabschnitten mit einer Gegensteigung,
  • Fig. 5 eine Ansicht auf ein Walzenpaar mit einer materialbedeckten Walze,
  • Fig. 5a eine Draufsicht auf das Walzenpaar nach Fig. 5 mit zwei Gegenförderabschnitten auf einer Walze.
  • Fig. 6 eine Draufsicht auf ein Walzenpaar mit auf beiden Walzen flexibel aufgereihten von verschieden genuteten Mantelabschnitten für die verschiedenen Materialien,
  • Fig. 6a eine Längsschnittansicht durch die Walze 32 nach Fig. 6,
  • Fig. 7 eine Draufsicht auf ein Walzenpaarabschnitt im Bereich der Abnahmezone mit einer dort wirksamen Streifenschneidwalze mit einer Querschneidvorrichtung zur Herstellung von Würfelgranulat,
  • Fig. 7a eine Seitenansicht auf die Einrichtung nach Fig. 7,
  • Fig. 8 eine Draufsicht auf ein Walzenpaarabschnitt im Bereich der Abnahmezone mit einer dort wirksam angeordneten Granulierzylinder zu Herstellung von Zylindergranulat,
  • Fig. 8a eine Seitenansicht auf eine Einrichtung nach Fig. 8,
  • Fig. 9 eine Draufsicht auf ein Walzenpaarabschnitt im Bereich der Abnahmezone mit einer dort wirksam angeordneten Abnahme- und Ausformschnecke zur Herstellung von Granulat und
  • Fig. 9a eine zum Teil geschnittene Seitenansicht auf die Einrichtung nach Fig. 9.
Embodiments of the invention are shown in the drawings and are explained in more detail below. Show it
  • 1 is a longitudinal sectional view through a tempered pair of rollers of a continuous mixing and shear rolling mill,
  • 2 is a view of a pair of rollers with a roller covered with material,
  • 2a is a plan view of the pair of rollers of FIG. 2,
  • 3 is a plan view of a pair of rollers with a roller provided with blind holes,
  • 3a shows a cross section in the area of the roll gap through the pair of rolls according to FIG. 3,
  • 4 is a view of a pair of rollers with a material-covered roller,
  • 4a is a plan view of the pair of rollers according to FIG. 4 with zone-wise groove sections with a counter pitch,
  • 5 is a view of a pair of rollers with a roller covered with material,
  • Fig. 5a is a plan view of the roller pair of FIG. 5 with two counter-conveyor sections on a roller.
  • 6 is a plan view of a pair of rolls with differently grooved jacket sections for the different materials, flexibly lined up on both rolls,
  • 6a is a longitudinal sectional view through the roller 32 of FIG. 6,
  • 7 shows a plan view of a roller pair section in the region of the removal zone with a strip cutting roller effective there with a cross-cutting device for producing cube granulate,
  • 7a is a side view of the device of FIG. 7,
  • 8 is a plan view of a roller pair section in the area of the removal zone with a granulating cylinder effectively arranged there for the production of cylinder granulate,
  • 8a is a side view of a device according to FIG. 8,
  • 9 is a plan view of a roller pair section in the region of the removal zone with a removal and shaping screw for the production of granules and effectively arranged there
  • 9a is a partially sectioned side view of the device of FIG .. 9

Wie die Fig. 1 zeigt, werden auf der Aufgabenseite 2.1 des Materials 8.3 die Walzenabschnitte so beheizt, dass das zu bearbeitende Material 8.3 an der Oberfläche der Walze 31 haftet.As shown in FIG. 1, the roller sections on the feed side 2.1 of the material 8.3 are heated such that the material 8.3 to be processed adheres to the surface of the roller 31.

In der Fig. 1 wird der Walzenabschnitt der Aufgabenseite 2.1 durch die Leitungen 1.11 und 1.12 temperiert. Fast immer muss dieser Abschnitt wesentlich höher geheizt werden als die Mittelzone 2.2 und die Zonen 2.3 und 2.4.In FIG. 1, the roller section of the feed side 2.1 is tempered by the lines 1.11 and 1.12. This section almost always has to be heated much higher than the middle zone 2.2 and zones 2.3 and 2.4.

In vielen Fällen ist es nützlich mit einer Schutzheizung mit Infrarotstrahlern 1.13 die Erwärmung des Aufgabe-Materials 8.3 zu verstärken.In many cases it is useful to use a protective heater with infrared heaters 1.13 to increase the heating of the feed material 8.3.

Im Walzenabschnitt der Mittelzone 2.2 entwikkelt sich bei einigen zähplastischen Materialien 8.3 durch Scherkräfte erhebliche Friktionswärme, die kontrolliert werden muss. Hierfür sind die innere zweite Temperierzone mit den Zu- und Ablaufleitungen 1 .21 und 1.22 sowie die äussere Schutzheizung 1.23 vorgesehen.In the roller section of the middle zone 2.2, some viscous materials 8.3 develop considerable frictional heat due to shear forces, which must be checked. For this purpose, the inner second temperature control zone with the inlet and outlet lines 1 .21 and 1.22 as well as the outer protective heating 1.23 are provided.

Im dritten Walzenabschnitt der Zone 2.3 wird in den meisten Fällen eine Reduzierung der Materialtemperatur angesteuert, dadurch dass über die Leitungen dritte Temperaturzone 1.31 und 1.32 von innen Wärme abgeführt und von aussen eine Gebläsekühlung 1.33 angebracht werden.In the third roller section of zone 2.3, a reduction in the material temperature is controlled in most cases by the fact that heat is dissipated from the inside via the lines third temperature zones 1.31 and 1.32 and a fan cooling 1.33 is attached from the outside.

Bei thermoplastischen Werkstoffen, die z.B. aus dem Pulver- oder Granulazustand aufgeschmolzen werden, hat sich eine erheblich verschiedene Nutgeometrie der beiden Scherwalzen als vorteilhaft erwiesen.For thermoplastic materials, e.g. are melted from the powder or granular state, a significantly different groove geometry of the two shear rollers has proven to be advantageous.

Die materialbedeckte vordere Walze 31 wird mit Nuten 35 ausgerüstet, deren Geometrie entlang der Ballenlänge erheblich verschieden ist, wie die Fig. 2a zeigt.The material-covered front roller 31 is equipped with grooves 35, the geometry of which varies considerably along the length of the bale, as shown in FIG. 2a.

Im Bereich der Materialaufgabe 2.1 werden N u-ten 35 von 0,5 bis 20 mm vorzugsweise 5 mm Tiefe und 1 bis 40, vorzugsweise 10 mm Breite eingearbeitet.In the area of material feed 2.1, grooves 35 of 0.5 to 20 mm, preferably 5 mm deep and 1 to 40, preferably 10 mm wide, are incorporated.

Sie werden über eine Länge von 25% bis 30% des Ballens gleichmässig tief eingeschnitten und bilden die Materialaufgabe- und Vorwärmzone 2.1 wie die Fig. 2a zeigt.They are cut uniformly deep over a length of 25% to 30% of the bale and form the material feed and preheating zone 2.1, as shown in FIG. 2a.

In der Mittelzone 2.2, der etwa 35% bis 40% der Ballen länge ausmacht, wird die Tiefe der Nuten 35 kontinuierlich etwa auf den halben Wert der Materialaufgabezone 2.1 vorzugsweise auf 2,0 bis 2,5 mm Tiefe wie bei einer kernprogressiven Schnecke reduziert. Hierbei ist es bei einigen Materialien, die sehr zäh sind vorteilhaft, die Zahl der Nuten 35 zur Verbesserung des Materialtransports zu verdoppeln.In the middle zone 2.2, which makes up about 35% to 40% of the bale length, the depth of the grooves 35 is continuously reduced to about half the value of the material feed zone 2.1, preferably to 2.0 to 2.5 mm depth, as in the case of a core-progressive screw. It is advantageous for some materials that are very tough to double the number of grooves 35 to improve the material transport.

Im dritten Walzenabschnitt der Homogenisierungszone 2.3, der etwa 25% bis 30% der Ballenlänge ausmacht erfolgt die Homogenisierung und häufig Abkühlung des Materials 8.3. Die Tiefe der Nut 35 wird vom Auslauf der kernprogressiven Mittelzone 2.2 konstant bis zum Nutenauslauf weitergeführt.In the third roller section of the homogenization zone 2.3, which accounts for approximately 25% to 30% of the bale length, the material is homogenized and often cooled 8.3. The depth of the groove 35 is continued from the outlet of the core-progressive middle zone 2.2 to the groove outlet.

Die Materialkühlung im dritten und vierten Walzenabschnitt, in der Homogenisierungszone 2.3 und der Abnahmezone 2.4 reduziert die Klebeneigung an den Walzen 31 und 32. Bei tieferen Temperaturen nimmt zusätzlich die Materialfestigkeit zu.The material cooling in the third and fourth roller sections, in the homogenization zone 2.3 and in the removal zone 2.4 reduces the tendency to stick to the rollers 31 and 32. At lower temperatures, the material strength also increases.

Hierdurch wird die Abnahme des Materials 8.3 als Streifen erleichtert und bei einer Granulierung das Zusammenhaften der Granulatkörner verhindert.This facilitates the removal of the material 8.3 as strips and prevents the granules from sticking together during granulation.

Die Abnahmezone 2.4 wird zweckmässigerweise mit ca. 10% bis 15% der Ballenlänge auf beiden Walzen 31 und 32 ohne Nuten 35 und 36 ausgeführt.The removal zone 2.4 is expediently carried out with approximately 10% to 15% of the bale length on both rollers 31 and 32 without grooves 35 and 36.

In den Versuchen zeigte sich, dass bei Materialien 8.3 mit höherem Schmelz- und Erweichungsbereichen mitunter die Erzeugung einer plastischen Materialbedeckung auf der Arbeitswalze 31 Probleme macht, solange die Materialtemperatur in der Aufgabezone 2.1 noch nicht hoch genug ist, um an den Nuten 35 und der Oberfläche eine genügende Materialhaftung zu bewirken. Nur in haftende plastische Materialschichten kann über Scherkräfte zusätzliche Friktionswärme eingeleitet werden. Hierbei lässt sich durch Friktion von Kunststoffschichten gegeneinander eine vielfach höhere Energieerzeugung erreichen, als bei Friktion von Kunststoff gegen Metalloberflächen.The tests showed that with materials 8.3 with a higher melting and softening range, the generation of a plastic material covering on the work roll 31 sometimes causes problems, as long as the material temperature in the application zone 2.1 is not yet high enough, on the grooves 35 and the surface to cause sufficient material liability. Additional frictional heat can only be introduced into adhesive plastic material layers via shear forces. In this way, friction between plastic layers can achieve much higher energy generation than friction between plastic and metal surfaces.

Aus dieser Beobachtung heraus werden im Aufgabe- und Mischbereich der Walze 31 die glatten Stegflächen 38 zwischen den Schräg-Nuten 35 mit einer Vielzahl von Sachlöchern 3.1 als Grübchen versehen, wie die Fig. 3 zeigt.On the basis of this observation, the smooth web surfaces 38 between the inclined grooves 35 are provided with a plurality of material holes 3.1 as dimples in the feed and mixing area of the roller 31, as shown in FIG. 3.

Ein kleiner zylindrischer Abschnitt der Bohrung mit 0,5 bis 10 mm Tiefe, insbesondere von 1 bis 2,5 mm Tiefe geht über in einen flachwinkeligen Lochgrund 3.3 (z.B. von 120° oder einer entsprechenden flachen Ausrundung des Lochgrundes 3.3).A small cylindrical section of the hole with a depth of 0.5 to 10 mm, in particular a depth of 1 to 2.5 mm, merges into a flat-angled hole base 3.3 (e.g. of 120 ° or a corresponding flat rounding of the hole base 3.3).

Der Lochdurchmesser beträgt 2 bis 20 mm vorzugweise 3,5 bis 5 mm bei einer Gesamttiefe von ca. 2 bis 3 mm.The hole diameter is 2 to 20 mm, preferably 3.5 to 5 mm with a total depth of approx. 2 to 3 mm.

Das Verhältnis von Lochdurchmesser zur Lochtiefe ist so zu bemessen, dass einerseits durch eine etwas längere Verweilzeit des Materials 8.3 ein zeitweiliges Anhaften oder Anschmelzen des Materials 8.3 im Sackloch 3.1 erfolgt, auf der anderen Seite durch die Gegen-Walze 32 genügend neues kälteres Material 8.3 zum Austausch des Lochinhalts hineingedrückt wird.The ratio of the hole diameter to the hole depth is to be dimensioned such that, on the one hand, due to a somewhat longer dwell time of the material 8.3, the material 8.3 temporarily adheres or melts in the blind hole 3.1, and on the other hand, through the counter-roller 32, enough new, colder material 8.3 Exchange of the hole content is pressed.

Die eingebrachten Sacklöcher 3.1 verbessern die Haftung der Materialbedeckung der Walze 31 durch ein mechanisches Verklammern und bilden zusätzlich Wärmeaustauschflächen.The blind holes 3.1 improve the adhesion of the material covering of the roller 31 by mechanical clamping and additionally form heat exchange surfaces.

Beim Einlaufen des Sackloches 3.1 in den Knet-Spalt 37 der Walzen 31 und 32 baut sich der Spaltdruck in diesem Bereich voll auf, weil in dem geschlossenen System keine Druckentlastung stattfinden kann; entsprechend gross ist die örtlich durch Friktion einleitbare Scherenergie und Wirbelbewegung im Lochgrund 3.3, wie die Fig. 3a zeigt.When the blind hole 3.1 enters the kneading gap 37 of the rollers 31 and 32, the gap pressure builds up fully in this area because no pressure relief can take place in the closed system; the shear energy and vortex movement in the hole bottom 3.3, which can be introduced locally by friction, is correspondingly large, as shown in FIG. 3a.

In schwierigen Fällen ist es sinnvoll auch die Stegflächen 38 der materialfreien Walze 32 mit Sacklöchern 3.1 der oben beschriebenen Art zu versehen. Sie dürfen jedoch bei gleichem Lochdurchmesser höchstens nur etwa halb so tief sein, wie die Sacklöcher 3.1 auf der Arbeits-Walze 31, damit sie die grössere Materialhaftung auf der Walze 31 nicht aufheben.In difficult cases it is useful to provide the web surfaces 38 of the material-free roller 32 with blind holes 3.1 of the type described above. However, with the same hole diameter, they may only be at most about half as deep as the blind holes 3.1 on the work roller 31, so that they do not cancel out the greater material liability on the roller 31.

Das Scherwalzensystem funktioniert nur mit einer gegenläufig angetriebenen gleichfalls genuteten Walze 32, welche ohne Materialauflage den anderen Teil des Scher- oder Walzenspaltes 37 bildet.The shear roller system only works with an oppositely driven, equally grooved roller 32, which forms the other part of the shear or roller gap 37 without material support.

Die Aufgabe der Nuten 36 in der Gegen-Walze 32 ist die Einleitung der Scherkräfte in die Aussenschicht der materialbedeckten vorderen Walze 31, das Einbringen von neuem Material 8.3 in diese Schicht und die Erzeugung der Materialschubkraft entlang des Materialknetes.The task of the grooves 36 in the counter-roller 32 is to introduce the shear forces into the outer layer of the material-covered front roller 31, to introduce new material 8.3 into this layer and to generate the material shear force along the material kneading.

Die Tiefe der Nuten 36 der Gegen-Walze 32 wird sehr viel kleiner gehalten als bei der materialbedeckten vorderen Walze 31. Diese Nuttiefe liegt bei etwa der Hälfte des Arbeits- oder Walzenspaltes 37, z.B. zwischen 1 bis 3 mm. Die Nutung der Gegen-Walze 32 wird von der Aufgabezone 2.1 bis zum glatten Auslauf in der Abnahmezone 2.4 in einer Tiefe durchgeführt.The depth of the grooves 36 of the counter-roller 32 is kept much smaller than in the material-covered front roller 31. This groove depth is at about half of the working or roller gap 37, for example between 1 and 3 mm. The counter-roller 32 is grooved at a depth from the feed zone 2.1 to the smooth outlet in the removal zone 2.4.

Mit Hilfe dieser Nuten 36 wird das Zugabe-Material 8.3 in den Walzenspalt 37 eingezogen und dort innig mit dem plastischen Material 8.3 vermischt, bzw. in die plastische Materialschicht 8.3 eingebettet. Über den Nutwinkel schieben diese Nuten 36 das Material 8.3 im Knet und auf der Arbeits-Walze 31 in Richtung der Abnahmeseite 2.4 vorwärts, wenn beide Walzen 31 und 32 gegenläufig angetrieben sind und auch einen gegen - laufigen Nutwinkel aufweisen.With the aid of these grooves 36, the addition material 8.3 is drawn into the nip 37 and there intimately mixed with the plastic material 8.3, or embedded in the plastic material layer 8.3. These grooves 36 push the material 8.3 over the groove angle in the kneading and on the work roller 31 in the direction of the take-off side 2.4, if both rollers 31 and 32 are driven in opposite directions and also have an opposing groove angle.

Versuche führten zu einem weiteren vorteilhaften Schritt, indem auf der Walze 32 zur Verstärkung der Mischwirkung zonenweise Nutenabschitte 4.2 mit einer Gegensteigung angeordnet werden, wie dies die Fig. 4 zeigt. Die Gegensteigung der Nutung erzeugen örtlich senkrecht zum Walzenspalt37 gegenläufig rotierende Knetwirbel 4b, wie die Fig. 4a zeigt.Experiments led to a further advantageous step in that groove sections 4.2 with a counter pitch are arranged on the roller 32 to increase the mixing effect, as shown in FIG. 4. The counter slope of the grooving produces kneading vortices 4b rotating in opposite directions locally perpendicular to the roller gap 37, as shown in FIG. 4a.

Die Zonen der Gegensteigung dürfen nur retativ kurz sein, weil sonst der gesamte Materialtransport im Knet- oder Walzenspalt 37 in Richtung zur Abnahmezone 2.4 zum Stillstand kommt.The zones of the counter slope may only be short, because otherwise the entire material transport in the kneading or roller gap 37 in the direction of the removal zone 2.4 comes to a standstill.

I n der Regel werden wenigstens zwei Gegenförderzonen 4.1 und 4.2 in der Walze 32 angeordnet, die jedoch nur eine Länge von 0,25 bis 1 mal Walzendurchmesser aufweisen sollten und zwischengelagerte Abschnitte mit starker Fördersteigung von mindestens ein bis zwei Walzendurchmesser Länge haben müssen.As a rule, at least two counter-conveying zones 4.1 and 4.2 are arranged in the roller 32, which, however, should only have a length of 0.25 to 1 times the roller diameter and must have intermediate sections with a strong conveying pitch of at least one or two roller diameters in length.

In Fig. 5 wird die Walze 32 mit zwei grösseren Gegenförderabschnitten 4.3 ausgerüstet. Während die Walze 31 mit Material 8.3 bedeckt ist, lässt man an den Punkten A und B jeweils eine Flüssigkeit z.B. Öl bei der Kautschukverarbeitung, oder einen flüssigen Stabilisator B in den Knet- oder Walzenspalt37 laufen. Solange die beiden Walzen 31 und 32 sich drehen, wird die Flüssigkeit durch die gegenläufige Nutsteigerung gegeneinander gefördert und gelangt über den senkrechten Materialwirbel in das zu bearbeitende Material 8.3.5, the roller 32 is equipped with two larger counter-conveyor sections 4.3. While the roller 31 is covered with material 8.3, a liquid is left at points A and B, e.g. Oil in rubber processing or a liquid stabilizer B in the kneading or roller gap 37. As long as the two rollers 31 and 32 are rotating, the liquid is conveyed against each other by the opposite groove increase and reaches the material to be processed 8.3 via the vertical material vortex.

Es können auf diese Weise zwei Flüssigkeitsberge in den Spalt37 aufrecht erhalten werden, die so hoch sind, dass die Überschussflüssigkeit seitlich über die Walzen 31, 32 treten kann und über eine Differenzverwiegung die aufgenommene Flüssigkeitsmenge erfasst werden kann.In this way, two mountains of liquid can be maintained in the gap 37, which are so high that the excess liquid can pass laterally over the rollers 31, 32 and the amount of liquid absorbed can be detected by differential weighing.

Aus den oben beschriebenen verschiedenen Schritten folgt, dass zur Optimierung der Walzen 31 und 32 eine Konstruktion entwickelt wurde, die es gestattet, durch flexibles Aufreihen von verschiedenen genuteten Mantelsegmenten 4.1, 4.2, 4.3, 4.4 für die verschiedenen Werkstoffe jeweils die optimale Nutgeometrie zu erproben, wie die Fig. 6 zeigt.From the various steps described above it follows that, in order to optimize the rollers 31 and 32, a design was developed which allows the optimal groove geometry to be tested for the different materials by flexibly lining up different grooved jacket segments 4.1, 4.2, 4.3, 4.4, as shown in FIG. 6.

Hierbei werden auf den temperierten Walzenkernen axial die verschiedenen Mantelsegmente 4.1,4.2,4.3,4.4 aufgereiht und erprobt, wobei die Walzen 31 und 32 nach Belieben mit den verschiedenen Segmenten bestückt werden können, wie aus der Fig. 6a ersichtlich ist.In this case, the various jacket segments 4.1, 4.2, 3.4, 4.4 are axially lined up and tested on the tempered roller cores, the rollers 31 and 32 being able to be fitted with the various segments as desired, as can be seen from FIG. 6a.

Für die Materialabnahme 2.4 laufen die Nuten 35, 36 in einem glatten Walzenabschnitt (2.4) mit etwa 10% der Ballenlänge aus. In diesem Bereich erfolgt die Abnahme des bearbeiteten Materials 8.3, wie die folgenden Figuren 7 bis 9a zeigen.For the material removal 2.4, the grooves 35, 36 run out in a smooth roller section (2.4) with about 10% of the bale length. In this area, the processed material 8.3 is removed, as the following FIGS. 7 to 9a show.

Die Materialabnahme als Streifen 7.1 geschieht mit einer Streifenschneidwalze 7, wie die Fig. 7 zeigt. Sie wird mit Rundmessern 7.6 bestückt und mit einem Zahnradpaar 7.2 von der Walze 31 aus mit etwas grösserer Geschwindigkeit angetrieben (ca. 5% bis 10% Vorlauf). Je nach Zahl der Rundmesser 7.6 werden mehrere Streifen 7.1 gleichzeitig erzeugt, die in einer Querschneidvorrichtung 7.4 mit Abnahmeblock 7.3 und Messerwalze zu Würfelgranulat 7.5 zerschnitten werden.The material is removed as strips 7.1 with a strip cutting roller 7, as shown in FIG. 7. It is equipped with round knives 7.6 and driven with a pair of gearwheels 7.2 from the roller 31 at a somewhat higher speed (approx. 5% to 10% advance). Depending on the number of circular knives 7.6, several strips 7.1 are produced at the same time, which are cut into cube granules 7.5 in a cross-cutting device 7.4 with removal block 7.3 and knife roller.

In einer anderen vorteilhaften Ausgestaltung, nach Fig. 8 und 8a, wird ein angetriebener Hohlzylinder 8.1 gegen die plastische Materialschicht der Walze 31 gepresst. Der Mantelumfang des Zylinders 8.1 enthölt eine Vielzahl von Bohrungen 8.2, durch welche das plastische Material 8.3 in den offenen Innenraum hindurchgedrückt wird. Dort befindet sich ein gekühltes Messer 8.4, das die durchgepressten Stangenabschnitte als Zylindergranulat 8.5 abschneidet. Zur Kühlung von Hohlzylinder 8.1 und darin befindlichem Granulatmateria) iäuft der äussere Mantel durch eine mit Wasser oder sonstigem Kühlmittel gefüllten Schale 8.6.In another advantageous embodiment, according to FIGS. 8 and 8a, a driven hollow cylinder 8.1 is pressed against the plastic material layer of the roller 31. The outer circumference of the cylinder 8.1 contains a plurality of bores 8.2 through which the plastic material 8.3 is pressed into the open interior. There is a cooled knife 8.4, which cuts off the pressed-through rod sections as cylindrical granules 8.5. To cool the hollow cylinder 8.1 and the granulate material contained therein), the outer jacket runs through a shell 8.6 filled with water or other coolant.

In einer weiteren Variante erfolgt die Abnahme von zähplastischen und sehr klebrigen Materialien 8.3 von der Walze 31 mit einer Abnahme- und Ausformschnecke 9.0, wie die Fig. 9 und 9a näher zeigen. Sie wird von aussen mit ihrer angepassten Zylinderöffnung 9.1 senkrecht bis auf einen kleinen Abstand zur materialbedeckten Walze 31 angeordnet. Die Stege 9.3 der rotierenden Schnecke 9.0 schaben plastisches Material 8.3 vom glatten Walzenabschnitt 2.4 herunter und führen es einer Ausformmatritze 9.4 zu. Dort wird es dann mit bekannten Granulier- oder Profiliereinrichtungen weiterverarbeitet.In a further variant, tough plastic and very sticky materials 8.3 are removed from the roller 31 with a removal and shaping screw 9.0, as shown in FIGS. 9 and 9a. It is arranged from the outside with its adapted cylinder opening 9.1 vertically up to a small distance from the material-covered roller 31. The webs 9.3 of the rotating screw 9.0 scrape plastic material 8.3 down from the smooth roller section 2.4 and feed it to a molding die 9.4. There it is then further processed with known granulating or profiling devices.

Claims (9)

1. Continuous mixing and shearing rolling mill for plasticisable material with two tempered rolls (3, 32) which rotate in opposite directions at differing peripheral speed, the length of said rolls being more than four times the roll diameter and said rolls having arranged on them sharpedged grooves (35, 36) running in opposite directions from one another at an acute angle to the roll axes, whereby the number of grooves (35, 36) on the circumference of the rolls and the depth of the grooves (35, 36) along the axes of the rolls increases from the bearing side with the material feed (2.1) to the middle of the rolls and from there, decreases again to the bearing side with the removal of material (2.4), and with devices for feeding and removing the material, said devices being adjustable in an axial direction along the roll gap (37) and being suitable for various types of material and additions, characterised in that the speed ratio of the two rolls (31,32) is altered periodically in the ratio of 5:1 up to a maximum of 1:5 in a time rhythm of 5 to 50 seconds.
2. Continuous mixing and shearing rolling mill as claimed in Claim 1, characterised in that to suit the melting behaviour of the material (8.3) the two rolls (31,32) are tempered through the inner tempering (1.11, 1.12, 1.21, 1.22, 1.31, 1.32) and through the external radiation heating (1.13,1.23) to different temperature levels along the surface length of the rolls (31, 32).
3. Continuous mixing and shearing rolling mill as claimed in Claims 1 and 2, characterised in that the front roll (31 ) which is covered with material is given a groove geometry along the surface length of the roll, with which in the material-feed zone (2.1 ), with about 30% of the surface length the grooves (35) are cut particularly deep, in the middle zone (2.2) with about 35% of the surface length, the grooves (35) are reduced progressively with the core to the flat groove depth of the homogenising zone (2.3) - approximately to half the value -, and in the take-off zone (2.4) of the material, which follows the homogenising zone (2.3) with about 25% of the surface length, both rolls (31, 32) are executed without grooves (35, 36) over a surface length of about 10%.
4. Continuous mixing and shearing rolling mill as claimed in one of the Claims from 1 to 3, characterised in that the smooth crosspiece surfaces (38) between the grooves (35, 36), particularly on the front roll (31 ) which is covered with material in the material-feed zone (2.1) and in the middle zone (2.2), are provided with a plurality of flat blind holes (3.1 ).
5. Continuous mixing and shearing rolling mill as claimed in one of the Claims from 1 to 4, characterised in that the rear roll (32) is equipped with one or several short counter-conveying zones (4.1,4.2) of about 0.25 to 1 roll diameter in length between interposed sections (4.3) with a strong conveying action.
6. Continuous mixing and shearing rolling mill as claimed in one of the Claims from 1 to 5, characterised in that for the front roll (31 ) and for the rear roll (32), on the tempered roll bodies, axial surface segments (4.1,4.2,4.3,4.4) are lined up which are designed differently as regards length, depth of groove and slope of groove.
7. Continuous mixing and shearing rolling mill as claimed in one of the Claims from 1 to 6, characterised in that in the take-off zone (2.4) material (8.3) arriving in stripform is taken over by a counter-positioned, driven and cooled take-off roll (7) which is designed such that it serves as a counterbearing for a cutter rolling device which is also driven with this, and in that the circular blades (7.6) divide the material (8.3) into narrow longitudinal strips (7.1) which are subsequently cut up by a transverse cutting device (7.4) into cube- shaped granulates (7.5).
8. Continuous mixing and shearing rolling mill as claimed in one of the Claims from 1 to 6, characterised in that material (8.3) arriving in the take-off zone (2.4) is pressed by means of a counter-positioned, additionally cooled granulating cylinder (8.1) through bores (8.2) on the cylinder surface and is cut on the inside by cutting blades (8.4) into cylindrical granulates (8.5).
9. Continuous mixing and shearing rolling mill as claimed in one of the Claims from 1 to 6, characterised in that material (8.3) arriving in the take-off zone (2.4) is taken off by a rotating worm (9.0) and transferred into a spiral cylinder (9.1) in order then to be pressed out through a forming-out device (9.4), and in that the worm (9.0) and the spiral cylinder (9.1) are positioned from outside at a perpendicular angle in relation to the front roll (31).
EP85116647A 1984-03-21 1986-02-06 Continuous mixing and shearing mill Expired EP0231398B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE19843426436 DE3426436A1 (en) 1984-03-21 1984-07-18 Continuous mixing and shearing roll mill
AT85116647T ATE37158T1 (en) 1986-02-06 1985-02-06 CONTINUOUS MIXING AND SHEARING ROLLING MILL.
DE8585116647T DE3660711D1 (en) 1986-02-06 1986-02-06 Continuous mixing and shearing mill
EP85116647A EP0231398B1 (en) 1986-02-06 1986-02-06 Continuous mixing and shearing mill
US07/011,661 US4773762A (en) 1986-02-06 1987-02-05 Continuous mixing and shearing rolling mill
JP62024943A JPS62254828A (en) 1986-02-06 1987-02-06 Continuous mixing and shearing roll mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85116647A EP0231398B1 (en) 1986-02-06 1986-02-06 Continuous mixing and shearing mill

Publications (2)

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EP0231398A1 EP0231398A1 (en) 1987-08-12
EP0231398B1 true EP0231398B1 (en) 1988-09-14

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EP (1) EP0231398B1 (en)
JP (1) JPS62254828A (en)
AT (1) ATE37158T1 (en)
DE (1) DE3660711D1 (en)

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DE9214486U1 (en) * 1992-10-27 1992-12-10 Color Metal Dr.-Ing. Albers Maschinenbau GmbH, 7843 Heitersheim Mixing and shearing mill for plasticizable material
DE4300298C2 (en) * 1993-01-08 1994-12-15 Degussa Process for the production of flexible plastic strips mixed with hard material and / or metal powders
DE4334697A1 (en) * 1993-10-12 1995-04-13 Condux Maschinenbau Gmbh & Co Continuous mixing and shearing roll mill
FR2723086B1 (en) * 1994-07-29 1996-09-13 Poudres & Explosifs Ste Nale CONTINUOUS PROCESS FOR THE SOLVENT-FREE MANUFACTURE OF COMPOSITE PYROTECHNIC PRODUCTS
CA2234889A1 (en) * 1997-07-24 1999-01-24 Lars Bach Structural board of cereal straw
US6131635A (en) * 1998-07-20 2000-10-17 Alberta Research Council Inc. Device for longitudinally splitting pieces of straw into separated strands
KR100415383B1 (en) * 2000-11-15 2004-01-16 한국타이어 주식회사 Banbury Mixer
WO2003018277A1 (en) * 2001-08-31 2003-03-06 August Albers Rolling mill system
JP2005255989A (en) * 2004-02-13 2005-09-22 Toray Ind Inc Paste dispersion method
CN102717449B (en) * 2012-06-13 2016-04-20 韩富城 The continuous compounding rubber production line of birotor and technique
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US2286405A (en) * 1938-12-08 1942-06-16 Farrel Birmingham Co Inc Method of and means for treating rubber
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JPH0448491B2 (en) 1992-08-06
ATE37158T1 (en) 1988-09-15
EP0231398A1 (en) 1987-08-12
US4773762A (en) 1988-09-27
DE3660711D1 (en) 1988-10-20
JPS62254828A (en) 1987-11-06

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